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1. LF: "Mechanical Radio" & ID'ers (score: 1): Author: Tom Gruis, EdD, KØHTF <[email protected]>; Date: Thu, 26 Oct 2006 11:02:22 -0500; Hi, all. Spark generators and rotary devices, interesting! On a milder level, before solid state, didn't the olde NDBs in the U.S. use a code wheel to key the transmitter for one of the sets of tower; /rsgb_lf_group-archives/html/rsgb_lf_group/2006-10/msg00404.html (9,906 bytes)

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